The alarm company finished up a couple days ago. They left some wall art.

Another thought if it is still possible. Remount all of this equipment to a piece of 1/4" or so thick aluminum and then mount that plate to the wall. Then have a cover made that can be placed over the outer perimeter of the plate and screwed into the plates edge. The cover could be louvered top, bottom and/or sides for air flow if heat is an issue. It would be nice if that one unit in the center could be mounted in any other way in order to keep the depth of the cover to a minimum. Also, the cover should provide a nice place to mount a sign of just the right size.